Regenerative reversing-furnace.



L. L. KNOX. I REGENERATIVE REVERSING FURNACE.

APPLICATION FILED AUG.7,1909.

Patented Mar. 8, 1910.

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INVENTOR WITNESSES L. L. KNOX. REGENERATIVE REVERSING FURNACE. AIPLIOATION IILEDAUG. 7, 1909.

Paten te d M22128, 1910.

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L. L. KNOX.

REGENERATIVB RBVEBSING FURNACE.

APPLICATION FILED AUG."1',1909.

Patented Mar. 8 1910.

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L. L. KNOX. REGENERATIVE REVERSING FURNACE. APPLICATION FILED AUG. 7, 1909.'

95 1 ,644. Patented Mar. 8, 1910.

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INVENTOR L. L. KNOX. REGENERATIVE REVERSING FURNACE APPLICATION FILED AUG. 7, 1909.

Patented Mar. 8. 1910.

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L. L. KNOX.

REGENERATIVE RBVERSING FURNACE.

APPLIGATION FILED AUG.7.1909.

Patented Mar. 8, 1910' 6 SHEETS-SHEET 6.

V INVENTOR [A lL i M WITNESSES poflion of the gas uptake.

PATENT OFFIQE.

LUTHER L. KNOX,'OF BEN AVON, PENNSYL VANIA, ASSIGNOR TO KEYSTONE FURNACE CGNSTRUGTION COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OF REGENEEATIVE :REVERSING-FURNAOE.

Application filed august 7,

to all whom may cancel n:

Be it known that I, Lif'rnna L. Knox, of Ben Avon, Allegheny county, Pennsylvania, have invented a new and useful Improvement in Regenerative lieversing- Furnaces, of which the following is a full, clear, and exact description. reference being had to the accoi'npanying drawings, forming part of this specification, in which Figure l is an end view of an open hearth furnace embodying my invention: Fig. 2 is a longitudinal section of one end portion of the furnace with the circulating pipes omitted: Fig". is a section on the line IIIIII of Fig. .2; Figs. 4:, 5, (3 are detail views showing a modified construction and arrange ment of the means for protecting the arch; Figs. 7, 8 and 9 are detail views showing another modification of the same; and Figs. 10 and 11 are detail sectional views showing still another modification.

My invention has relation to regenerative Referring first to the form of my inven-- tion shown in Figs. 1, 2 and of the drawings, the numeral 2 designates the supporting walls and framework of an open hearth furnace of the regenerative reversing type and which may. in general. be of any approved coustruction. 3 designates the gas uptake leading from the regenerator, and 4 "the air uptakes arranged one at either side of the central gas uptake. 5 is the slag pot at the lower end of the gas uptake, and 6 designates the slag pot of the air uptakes. 7 designates the air line connecting the upper ends of the air uptakes with the furnacer-chambcr 8, and 9 the gas tine leading into the furnace chamber from the upper 10 is the wall or arch separatingthc air and gas lines 7 and 9. This wall or arch 10 consists of a y or". refractory nu. rial having conzed therein a hollow water-corded box Specification of Letters Patent.

Patented Mar. 8, 1910.

1909. Serial No. 511,724.

or castin 11.- This box or casting maybe of any snit-zible construction, such as that shown in detail in Fig. 6. As there shown, it is provided at its outer end, which extends through and beyond the outer wall or bulk head of the furnace, with an admission chamber 12, into which the cold water enters as by a suitable supply pipe From this admission chamber the water passes by a series of pipes ii to a point nearer the lower end of the casting where it is discharged.

As the water becomes heated, it gradually rises to the upper end of the box or casting and passes out at the discharge pipe 15. As is well known, the inner end of nose portion of the arch or Wall 10 is the part which is subjected to the most destructive action of the hot air and gases, and in practice, as heretofore constructed, this inner end or nose rapidly burns or cuts away. An important object of my invention is to protect this exposed inner end or nose of this arch or wall. This I accomplish in the form shown in Figs. 1, 2 and 3 by means of the supplemental cooling box or casting 16, which is in the form of an arch, as shown in Fig. 3, and which provided with a par tial covering l7, of refractory material at both its upper and lower sides. This box or casting 16 has an exposed portion 16, which protects inwardly beyond the refractory material and extends over the lower portion of the some in the manner shown, thereby preventing the direct contact of the hot gases therewith. This end or nose portion of the wall or arch is formed separately from the main body of the wall or arch and is supported on the side wall of the flue 9, as shown at 18 in Fig. 3. The box or casting 16 is provided with suitable watercirculating connections 19, and 20, the supply pipe 19 being shown as extending inwardl y through the wall of the furnace and communicating with the box at its lowest point, while the outlet pipe 20 leads from the central arch top of the box at its high est point and thence upwardly through a protecting brick or block 21 of refractory material and out through the roof of the furnace, as shown in Fi 2. This separate end or nose portion of the arch can be readily removed and replaced whenever necessary, without disturbing the main portion of said wall or arch. The cooling box or casting within the latter can, also be readily takes 3 and 4 are also protected by means of the cooling boxes or castings 22, 23,24 and 25. These boxes or castings are protected by a substantial lining of refractory material 26. The castings 22, 24 and 25 are provided at their lower ends with the inward extensions 27, which support this lining, and in order that the inner ortions of these extensions may be protecte the inner walls of the uptakes are offset outwardly, as shown at 28, thereby permitting a substantial thickness of the refractory lining 26 to be carried down in front of the-extensions 27. with one or more openings 29, normally filled with refractor material 30, which can be readily remove to permit ,a suitable poker or scraper or other cleaning tool to be introduced into the gas and air flues. The gas uptake 3 is provided with the inclined portion 3, and in order to protect the lower wall of this inclined portion, I provide the cooling box or casting 31, which extends obliqu'ely within said wall, in the manner .shown in Fig. 2, this box or casting being similar in its general form and arran ement to the box or casting 11, already escribed. It projects outwardly through the outer wall of the uptake, so that it can be readily removed, if necessary, and is pro vided with suitable water circulating connections 32. 33 desi nates water-circulatim D connections for the'boxes or castings 22, 23,

24 and 25, these connections being best shown in Fig. 1. 34 designates smaller cooling boxes, which are preferably inserted in the outer wall of the gas and air uptakes and below the castings 22, 24 and 25.

Figs. 4, 5, 6 show a modified construction of an arran ement of means for protecting the inner end or nose of the wall or arch 10. In the construction and art'an ement shown in these figures, I provide a ollow'watercooled box or castin 35, which extends across the.'inner end 0 said wall or arch, as shown in Fig. 4 and entired across the furnace, as shown in Fig. 5. tion of this box or'casting over the gas flue 9 is of arch form, as shown in Fig; 5, and the entire box or casting can be readily removed at either side of the furnace. 36 desi nates water-circulating connections for this ox or casting. In vFig. 5, I have shown two sets of such connections, so arranged that the lower pipe at either side may be used for the inlet andthe up er pipe at the opposite side for the outlet, t e two sets bet of injury to the other.

The castings 22 and 23 are provided,

he central poring provided so that one may be used in case .In the modification shown in Figs. 7, 8 v

and-9, the inner end .or nose portion of the wall or arch 10 is formed by a hollow box or casting 37, which is supported on the side walls of the gas flue 9, at its ends, and which is also supported by a hook portion 38, engaging a recess or depression 39 in the box or casting 11. The box or casting 37 is directly exposed to the hot air and gases and can e readily removed and replaced wherr necessary. It effectually protects the entire inner end or nose of the wall or ?arch 10 from the cutting action of the hot air and gases. 40 designates circulating connections for this box or casting, which connections may, as shown, be carried through the refractory portion. of the wall or arch 10.

The means for protecting the innerend "ornose of the wall or arch 10 shown in Figs. 10 and 11, is similar to that shown in Figs. -1, 2 and 3, except that instead of forming the downwardly extending portion 16 in a separate piece, it is formed as an integral extension of the box or casting 11'.

41, wherever seen 111 the several figures,

designates clean-out connections for the boxes or castings 11, 11", 16 and 37.. These connections provide means whereby the boxes may be flushed out when desired.

They extend laterally through the side walls of the furnace and can be readily disconnected when necessary. In setting thecoolin boxes or castin 11 and 11, I preferably place a body 0 sand or :other relatively loose refractor material above the same within the wal or arch '10 asindicated at 42, in order to facilitate the removal of the boxes or castings when necessary.

The advantages of my invention result from the PIOVlSlOIl of means of the character described, whereby those portions of the gas and air uptakes or flues,.which are most subject to the destructive action of the hot air and uses are protected.

It will ma be made in the details of construction an arrangement of the form and construction of t e several cooling boxes or castings may be changed to ther with the arrangement of the circu ating connections. Said boxes or castings may be aflling, for securing the most efiective' water circulation therein and variousother changes made within the spirit and scope of may be the ap ended claims.

Whi e I have shown but one end portion of the furnace in the drawings, it-will be readily understood that the uptakes and fines atboth ends ofthe' furnace may be. similarly protected.

I claim 1. A, regenerative reversinghfurnace hav- 1 arts. 'Thus, the

ing a refractory wall or arch separating the gas and air fines, and a hollow water-cooled box or casting at the inner end of said well or arch and covering the refractory material thereof to prevent contact. of the hot gases therewith, substantially as described.

2. A generative. reversing furnace having a r actory wall'or arch separating the and air fines, and a hollow water-cooled box or casting at the inner end of said wall or arch, and forming the nose thereof, said box or casting covering the endsurface of the arch and protecting the refractory inatcrial of the end portion of the arch, substantially as described.

3. In a regenerative reversing furnace, a wall or arch of refractory material separating the gas and air fines, and a water-cooled 'box or casting of arch form extending over the gas flue at the inner end of the wall or arch and entirely covering the refractory material thereof, substantially as described.

4-; In a regenerative reversing-furnace, a wall or arch separating the gas and air fines, and a water-cooled box or casting of arch form extending over the gas fine at the inner end of the wall or arch, said box or casting being removable through a side wall of the furnace, substantially as described.

in a regenerative reversing furnace, a wall or arch of refractory material separat: ing the gas and air fines, and a hollow box or casting extending transversely across the inner end of said wall or arch and covering over and protecting the refractory material thereof. substantially as described.

(3. in a regenerative reversing furnace, a wall 0' arch of refractory material sepa ating the gas and air fines, and a hollow box 2 or casting extcndin transversely acrossthe inner end of said wall or arch and protecting the. retractory material thereof, said box being rcmovableat one side of the furnace through the wall thereof, sulistaiitially as described.

7. A regenerative reversing furnace having a wall or arch separating its gas and air tines, the inner end or nose portion of said wall or arch comprising a hollow watercoolcd mei'nber extending downwardly to the lower surface of the wall or arch and fitting close against and covering over that part of the end surfacelof the wfll or arch which it abuts, substantially as described.

A regenerative reversing furnace having a wall or arch separating the gas and air fines, and a hollow water-cooled boxor casting extending transversely at the inner end of said wall or arch and having an exposed portion covering over and protecting the inner end of the lower portion of said will or arch, substantially-as described.

9. A regenerative reversing furnace having a wall or arch separating its gas and air fines, and a hollow watercooled box or 4 wasting forming the inner end or nose portion of said wall or arch, said box or casting covering over the refractory material at the inner end of the arch and being rcuiovably' supported, substantially as descril'ied.

10. A regenerative reversing furnace having a wall or arch separating its gas and air tlues'and having a cooling box or casting contained therein, and a supplemental cooling box or casting extending transversely at the inner end of said wall or arch and having an exposed portion. substantially as described.

11. In a regenerative reversing furnace, an Lip-take having its outer wall or bulk head below the arch scparataing the gas and air fines provided with a water-Fooled box or casting having an inner lining of refractory material, said box or casting havingmeans for supporting said lining, said box or casting fitting underneath the said arch at its upper end; substantially as described.

12. In a regenerative reversing furnace, an uptake having its outer wall or bulk head provided with a water-cooled box or casting, said box or casting having an opening there through, and a removable filling of refractory material for said opening and seated within the said opening, substantially as described;

13. In a regenerative reversing furnace, an uptake port or passage having an inclined ortion, and a water-cooled box or casting inserted in the lower wall of such portion and substantially parallel with the inner surface of such wall, substantially as described.

14. In a regenerative reversing furnace, an uptake port or passage having an inclined portion, and a'water cooled box or casting inserted in the lower wall of such portion and substantially arallel with the inner surface of such val said box or casting being removable through the end wall of the uptake, substantially as described.

15. In a regenerative reversing furnace, a wall or arch separating the gas and air ports and comprising a body of refractory material having a hollow water-cooled box or casting contained therein, and a filling of relatively loose refractory material partially surrounding said box or casting, substantially as described.

16. In a regenerative revcrsing furnace, a

outer end of the wall or arch, and the other being removable through a side wall of the ,fnrnace, substantially as described.

17. A regenerative reversing furnace havinga wall or arch separating its gas and air fines, and a gas 11 -take leading upwardly to the gas flue, said up-take having separate bulk heads or end walls above and below the i said arch composed of a water-cooled box or casting, and a refractory lining supported thereby; substantially as descri j 18. A regenerative reversing furnace having an arch separating its gas and air flues, sa1d arch comprising a body of refractory material having water-coolingmearis embeddedtherein, and a hollow water-cooling member extending transversely across the inner end of said arch and forming the nose thereof, said member covering over and protectin the refractory material at the inner end 0 the arch; substantially as described.

19. In a regenerative reversing furnace, a wall or arch'of refractory material separating the gas andair fines, and a watercooling member forming the inner end or.

nose of said arch, said member having means I for circulating water therethrou 'h, and also having a-clean-out connection w ich is independent of the water -circnlating connections; substantially as described.

20. In a regenerative reversing furnace, a wall or arch of refractory mater1-a1.sepa-' rating the gas and air flues, lind- :1 0001111 means embedded in said wall orjarch, an

havin e portionbeyond the end of the arch 

